" It has to be outside the subfolder for it to load in the render tab"

Yes, that's something that would be nice to see fixed in Poser 12. So that, for instance, the user's custom Sketch render presets can be logically organised in named folders. Rather than having a huge list to scroll down, which is what Poser 11 currently offers.

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Learn the Secrets of Poser 11 and Line-art Filters.